Pablo Barberá
January 22, 2016
Moreno, Who Shall Survive?, 1934
Moreno, Who Shall Survive?, 1934
Moreno, Who Shall Survive?, 1934
Moreno, Who Shall Survive?, 1934
Christakis & Fowler, NEJM, 2007
Adamic & Glance, 2004, IWLD
Barberá et al, 2015, Psychological Science
Social network analysis:
Node (vertex): each of the objects in the graph
Edge (tie): each of the connections between nodes.
Two types of edges:
A graph consists of a set of nodes and edges.
Network visualization:
Adjacency matrix:
Jennifer Pablo Dan Kevin Denis
Jennifer 0 1 1 0 0
Pablo 1 0 0 1 1
Dan 1 0 0 1 0
Kevin 0 1 1 0 1
Denis 0 1 0 1 0
Edgelist:
Node1 Node2
[1,] "Jennifer" "Pablo"
[2,] "Jennifer" "Dan"
[3,] "Pablo" "Kevin"
[4,] "Pablo" "Denis"
[5,] "Kevin" "Denis"
[6,] "Dan" "Kevin"